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Proceedings Paper

Dynamic response tuning of composite beams by embedded shape memory alloy actuators
Author(s): Travis L. Turner
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Paper Abstract

The thermomechanical performance of a shape memory alloy hybrid composite beam specimen is demonstrated and used in a preliminary validation study of a recently developed constitutive model and finite element formulation for analysis of such structures. A brief description of the thermoelastic formulation is given. A material system consisting of a glass/epoxy matrix with embedded Nitinol actuators was chosen for this study. Results from Nitinol material characterization testing, beam specimen fabrication processes, and base acceleration testing for measuring the dynamic response performance in presented. Selected results from the dynamic test are shown, interpreted, and compared with predictions form the FE model. Elimination of a thermal post-buckling deflection by the activated SMA was observed. The fundamental natural frequency is shown to increase by a facto of 5.3 and the RMS displacement response is attenuated by a factor 6.4. Preliminary comparisons between predicted and measured performance is good. Discrepancies are attributable to insufficient knowledge of the matrix material properties at elevated temperature.

Paper Details

Date Published: 12 June 2000
PDF: 12 pages
Proc. SPIE 3991, Smart Structures and Materials 2000: Industrial and Commercial Applications of Smart Structures Technologies, (12 June 2000); doi: 10.1117/12.388180
Show Author Affiliations
Travis L. Turner, NASA Langley Research Ctr. (United States)

Published in SPIE Proceedings Vol. 3991:
Smart Structures and Materials 2000: Industrial and Commercial Applications of Smart Structures Technologies
Jack H. Jacobs, Editor(s)

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